angular 学习笔记之 服务

一、创建服务命令
ng g service my-new-service
创建到指定目录下面
ng g service services/storage

三、app.module.ts 里面引入创建的服务
1.app.module.ts 里面引入创建的服务
import { StorageService } from './services/storage.service';

2. NgModule 里面的providers 里面依赖注入服务

@NgModule({
declarations: [
AppComponent,
HeaderComponent,
FooterComponent,
NewsComponent,
TodolistComponent
],
imports: [
BrowserModule,
FormsModule
],
providers: [StorageService],
bootstrap: [AppComponent]
})
export class AppModule { }

四、使用的页面引入服务,注册服务

import { StorageService } from '../../services/storage.service'; 
constructor(private storage: StorageService) { }
使用

addData(){ 
   this.list.push(this.username); 
   this.storage.set('todolist',this.list); 
} 

removerData(key){   console.log(key);   
this.list.splice(key,1);   this.storage.set('todolist',this.list); }

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转载自www.cnblogs.com/zhaoqiusheng/p/11095211.html
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